Hi Marbyg,

Thank you for contacting support. I have researched previous questions with this error, and the overall response was that there were files that cannot load due to not uninstalling.

Can you please provide the steps you took to uninstall Firefox on Windows 7, others have solved this issue by going directly to the Firefox Download and installed from here: http://www.mozilla.org/en-US/firefox/new/

"I simply went to Mozilla and downloaded the current version of Firefox - I then just let it do its own thing and 'upgrade' my current installation, and a few minutes later, Firefox is up and running with all of my setings, add-ins etc fully intact and operational! " Refhttps://support.mozilla.org/en-US/que.../965228

Please post back to let us know what steps you took to uninstall and reinstall.

Other troubleshooting steps you can take is to launch the browser in safe mode to see if it is an installed add on Ratkaise Firefoxin ongelmia vikasietotilan avulla

I am having the same problem. When I try to open my computer XPCOM Comes up HELP

Hi geraldineeve,

This is an old thread, this may be a new issue. If the above information does not resolve your issue, please consider creating a new thread containing the specific details of your issue.

Doing so will allow the Mozilla volunteers to give you solutions that are more helpful to you. This may help them to solve your problem faster and more efficiently.

Please, feel free to post the link to your thread on this thread for volunteers interested in assisting you.

Thank you.